330-008C

Check axis movement manually

In Manual mode, jog the affected axis at low feedrate (F100) to identify binding or unusual resistance.

Ensure machine is in safe state before manual movement

Inspect mechanical components

Check ballscrews, linear guides, and spindle for debris, damage, or inadequate lubrication causing excessive friction.

Listen for unusual noises during slow manual movement

Verify cutting parameters

Review programmed feedrates and spindle loads in the active NC program to ensure they don't exceed machine capabilities.

Check Program Run > Program Info for maximum programmed feedrates

Test with reduced load

Run a simple positioning move without cutting load to isolate mechanical vs. process-related causes.

Use MDI mode with G0 moves at 25% rapid traverse override

Access machine parameters

Navigate to Setup > Machine Parameters and locate MP7500 series parameters for SS1 timeout configuration.

Parameter changes require machine manufacturer authorization

Compare with manufacturer specifications

Verify MP7500 timeout values match the machine builder's recommended settings for your specific motor/drive combination.

Check machine documentation for original MP7500 values

Monitor actual braking time

Use TNC Diagnostics > Drive Monitor to observe actual deceleration times during controlled stops.

Record multiple measurements at different feedrates for analysis

Adjust timeout if necessary

If authorized, incrementally increase MP7500 timeout value by 10-20% and test, ensuring safety margins are maintained.

Consult machine builder before modifying safety-related parameters

Check drive status

Navigate to Diagnostics > PLC Status and examine drive ready signals and fault status for the affected axis.

Look for intermittent drive faults that may clear after alarm reset

Test motor brake operation

With axis powered down, manually check if motor brake engages/releases properly during power cycling.

Follow lockout/tagout procedures before accessing motor components

Verify encoder feedback

In Setup > Axis Test, monitor position feedback stability and check for encoder signal integrity issues.

Compare commanded vs. actual position during slow movements

Inspect drive connections

Check motor power cables, encoder cables, and brake connections for loose connections or damage.

Use thermal imaging to identify overheating connections if available

Review safety input status

Check Setup > PLC > Input/Output Status for safety door, E-stop, and other safety-related input states.

Look for inputs that may be triggering unexpectedly

Examine PLC program logic

Review the machine PLC program for SS1 activation conditions and timing sequences in the safety logic.

Only qualified personnel should modify safety PLC logic

Test safety system response

Perform controlled safety system tests to verify proper SS1 activation and timing under various conditions.

Document response times for comparison with specifications